Unaudited Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 79,409	$ 116,751	$ 178,190	$ 256,645
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(18,231)	3,026	(8,273)	12,327
Changes in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented	0	20	0	(34)
Cash flow hedges:
Deferred gains (losses), net of tax of $2,518 and $1,363, for the three and nine months ended July 31, 2018, respectively, and of $(1,971) and $(4,917) for each of the same periods in fiscal 2017, respectively	(12,371)	8,517	(7,891)	19,005
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $247 and $2,767, for the three and nine months ended July 31, 2018, respectively, and of $232 and $(933) for each of the same periods in fiscal 2017, respectively	(1,662)	22	(12,510)	5,615
Other comprehensive income (loss), net of tax effects	(32,264)	11,585	(28,674)	36,913
Comprehensive income	$ 47,145	$ 128,336	$ 149,516	$ 293,558